Concrete-mold.



L. GIGUERE.

CONCRETE MOLD.

APPLICATION FILED JULY 14.1913

Patented Dec. 15, 1914.

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L. GIGUERB. CONCRETE MOLD. APPLICATION FILED JULY 14. 1913.

Patented Dec. 15, 1914.

2 SHEETSSHEET 2.

v 121mm Molds;

LIMOGE GIGUIEBE, or MONTREAL, QUEBEC, CANADA.

I CONCRETE-MOLD.

' Specification of Letters Patent. I t t '15,1 14

Application filed July 14, 1913. Serial No. 779,009.

To all whom it may concern Be it known that I, LIMOGE Giooisnn, asubject of the King. of Great Britaimand resident of 1886 St. ChristopheColomb street, in the city of Montreal, Province of Quebec, Canada, haveinvented certain new and useful Improvements in Concreteand I do herebydeclare that the following is a full, clear, and exact description ofthe same. v

The invention is an improved concrete mold, and has for its object theprovision of a machine for molding concrete blocks with great speed andfacility and wherein great power can be obtained by hand for compressingthe block and thus producing a better article from a polnt of view ofinner slde face of each of said pinions being formed with ratchet clutchteeth 16 adapted durability.

The invention is an improvement on the device for which I have alreadymade application for Letters-Patent in the United States of America,Serial No. 7 59,006, filed on the 5th day of April, 1913, and thepresent invention contains certain improvements upon the mechanism forraising and lowering the pressure plate, additional means for obtaininggreat pressure in squeezing the block and means for insuring that allblocks will be the same size. I

The present invention also containscertain improved means for lockingthe sliding cover in place over the mold.

The invention is illustrated inthe accom drawings in whichpanying Figure1 is a side elevation of the machine according to the invention. Fig. 2is a vertical section on the line A-B, Fig. 1. Fig

3 is aside elevation of the cover locking lever and Fig. 4 is a sideelevation of one of the block compressing eccentrics and adjacent parts.

Like numerals of reference indicate corresponding parts in each figure.7

Referring to the drawings, 1 indicates the base of the machine formed ofthe pair of end frames 2 and 3, each having a central vertical guidingslot l.

5 are bearings supported on the cross bars 6 in alinement one on each ofthe frames 2 and 3 towardthe upper end of said frames, said bearingshaving the shaft 7 journaled therein and projecting a little therebeyondat-each end.

8 is the mold box opening at its top and bottom as in my said previousinvention and having a pressure plate 9 forming a loose bottom to saidbox and adapted to be forced upwardly to squeeze the block in the moldbox between itself and the sliding cover 1() which is also constructedto slide back on to a bracket 11 as in my previous invention.

12 is a rod extending across the base of the machine at its lower endinto the guiding slots 4:, and 13 are a pair of upwardly extendinglifting arms disposed within the base of the machine one adjacent toeach end frame and connected at their lower ends to the rod 12 andabutting the pressure plate 9 at their upper ends. The middle portion ofeach of the arms 13 is pierced out and formed with a rack 14 on onesideof said piercing which is engaged by a toothed to be engaged in onedirection by similar shaped teeth on the clutch collars 17 which areslidably and rotatably mounted on the shaft 7 through the well known.medium of key ways.

The clutch collars 17 are normally retained in contact with the teeth 16through the medium of a coil spring 18 encircling the shaft'7 betweensaid collars and compressing them both'outwardly. It will thus be seenthat when the shaft 7 is turned in one direction, the collar 17 turningwith the shaft, will engage the pinions 15 and rotate them also with theshaft, thus lifting the arms 13 and forcing up the pressure plate, saidarms being guided in their movement by the ends of the rod 12 in theslots 1-. This movement however, is only utilized when forcing thefinished block out of the mold, the turning of the shaft 7 beingaccomplished through the medium of the gear 19 rigidly mounted on oneend of said shaft engaged by the pinion 20 to which is connected ahandle 21.

It could be arranged so that the movement just described could beutilized for compressing the block within the mold, but it has beenfound almost impossible by such movement to make the blocks of an evendepth, hence, the use of the clutch halves 16 and Y17 which operate inconjunction with pressure arms 22 one at each end of the machine andcoupled across by the bar 23 which extends through the lifting arms 18.

Within the lower end of each of the pressure arms 22a collar 24'rotates, said collars being rigidly and eccentrically mounted on theshaft 7 as shown in Fig. 4:. It has been previously explained how theturning of the shaft 7 in one direction raises the lifting arms 13, butif the shaft is turned in the other direction it willbe seen that theclutch halves 17 will slip over the teeth 16 and consequently will notturn the pinions 15. In this reverse movement however the collars 2 1will obviously raise the pressure arms 22 a short distance and in doingso will force upward the lifting arms 13 as the rod 23 contacts theupper end of the piercing '14 in said lifting arms. Thus it is areversemovement of the handle 21 which applies the compression tothe blockwithin the mold and in such compression the pressure plate 9 will belifted a uniform distance each time 1 so that all blocks will be thesame size and 3 and having the handles compressed to the same degree.'Further-,

more, greater pressure can be obtained with the use of the arms 22 thancould be obtained by simply forcing up the lifting arms through themedium of thepinions 15.

25 are collars loosely mounted one at' each end of the shaft 7 outsideof the frames2 and 3, said collars being also eccentrically mounted onthe shaft as illustrated in Fig.

26 extending forwardly'therefrom. g I

27 are straps encircling the collars 25 and each having a verticallyextending handle 28 passing through a slot 29 in the overhanging ends ofthe sliding cover 10 as in my prior invention. Each handle 28 is alsoprovided with a notch 30 adapted to engage the cover at an edge of theslot 29.

After the concrete has been placed in the mold 8 while the cover 10 isresting on the bracket 11 with the handles 28 extending through theslots 29, the said handles 28 are pulled forwardly until the cover 10is 1. In a concrete mold, a frame, a mold adapted to liftthe latter,said provided with racks, means for guiding said? lifting armsin theirvertical movementya shaft j'o'urnaled across said frame, pinions quentupon the mutual engagement at said:

2. In concrete mold, a frame, a mold clutch means.

box supported on said fram a cover for the open top of said box, apressure plate forming a loose bottom to said box and ver ticallymovable therein, lifting'arms extending vertically bel owi said pressureplate and loosely mounted on saidshaft and coacting with the racks onsaid lifting arms and havv v ing ratchet clutch faces, clutch halvesadapted to engage said faces and slidably butnon: rotatably mou ted onsaid shaft, collars'r g idly and e'cc'entri'c'ally mounted on saidshaft,

pressure arms encircling said, collars and" engaging said hftrng armsand means for rotating said shaft.

3. In a concrete mold, a framea mold box, a sliding oover adapted toopen and closethe open top "of said box, a pressure plate forming aloose bottom to said box, a shaft journaled across said frame,ineans forraising said pressure plate from the rotation of said shaft, collarsloosely'and eccentrically encircling said shaft one at eachend andhaving handles extending therefrom, straps encircling said eccentricsand having upwardly extending handles passing through slots in saidcover and having notches near their upper ends adapted to en-" gage thecover at the edge of said slots and lock said cover in position on saidmold box when the straps are lowered by the turning of said firstmentioned handles.

Signed at the city of Montreal, Quebec,

Canada, this 7th day of July, 1913.

. LIMOGE GIGUERE. Witnesses:

' C. PATENAUDE,

WILLIAM K NNEDY.

co ies or this a e may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. C. i 1

